The Koenigsegg One:1 is finally here and it's determined to become the world's fastest road legal car. And looking at the numbers, the Swedish "Mega car" has what it takes and maybe even more. The One:1 is powered by a 5.0-liter aluminum V8 engine producing 1,341 Hp and weights 1,341 Kg (2,956 pounds) which explains the name and which also explains why the 0 to 400 Km/h (248.5 mph) sprint is expected to take just 20 seconds. Top speed is expected to be more than 440 km/h (273 mph).

The car will make its debut at the Geneva Motor Show next month and only six units will be built.

The key to The One's mind blowing top speed is a sophisticated active aero system that allows for two different modes: High downforce and High speed.